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The image reduction and analysis facility (IRAF) is a powerful tool for the reduction of images. This package is available on the VAX and UNIX machines in the astronomy cluster. Images start as FITS images and are converted to a format that IRAF can read. The images can then be calibrated and reduced. IRAF can make photometric measurements as well. This package is a major part of data reduction at Mt. Stony Brook. The details of IRAF's procedures are too lengthy to describe here. Figure 5 contains a flowchart to show the usual reduction procedure. There are many more tasks that can be completed by IRAF, and the manuals available in the department should be consulted.

Scott J. Wolk
Mon Nov 25 15:41:03 EST 1996